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#define EXTUNIX_WANT_VMSPLICE
#define EXTUNIX_WANT_SPLICE
#define EXTUNIX_WANT_TEE
#include "config.h"
#include "common.h"
#if defined(EXTUNIX_HAVE_SPLICE) || defined(EXTUNIX_HAVE_TEE) || defined(EXTUNIX_HAVE_VMSPLICE)
static const int splice_flags_table[] =
{
SPLICE_F_MOVE,
SPLICE_F_NONBLOCK,
SPLICE_F_MORE,
SPLICE_F_GIFT
};
#endif
#if defined(EXTUNIX_HAVE_SPLICE)
CAMLprim value caml_extunix_splice(value v_fd_in, value v_off_in, value v_fd_out, value v_off_out, value v_len, value v_flags)
{
CAMLparam5(v_fd_in, v_off_in, v_fd_out, v_off_out, v_len);
CAMLxparam1(v_flags);
unsigned int flags = caml_convert_flag_list(v_flags, splice_flags_table);
int fd_in = Int_val(v_fd_in);
int fd_out = Int_val(v_fd_out);
loff_t off_in;
loff_t off_out;
loff_t* off_in_p = NULL;
loff_t* off_out_p = NULL;
size_t len = Int_val(v_len);
ssize_t ret;
if(Is_some(v_off_in)) { off_in = Int_val(Some_val(v_off_in)); off_in_p = &off_in; }
if(Is_some(v_off_out)) { off_out = Int_val(Some_val(v_off_out)); off_out_p = &off_out; }
caml_enter_blocking_section();
ret = splice(fd_in, off_in_p, fd_out, off_out_p, len, flags);
caml_leave_blocking_section();
if (ret == -1)
caml_uerror("splice", Nothing);
CAMLreturn(Val_long(ret));
}
CAMLprim value caml_extunix_splice_bytecode(value * argv, int argn)
{
(void)argn;
return caml_extunix_splice(argv[0], argv[1], argv[2],
argv[3], argv[4], argv[5]);
}
#endif
#if defined(EXTUNIX_HAVE_TEE)
CAMLprim value caml_extunix_tee(value v_fd_in, value v_fd_out, value v_len, value v_flags)
{
CAMLparam4(v_fd_in, v_fd_out, v_len, v_flags);
unsigned int flags = caml_convert_flag_list(v_flags, splice_flags_table);
int fd_in = Int_val(v_fd_in);
int fd_out = Int_val(v_fd_out);
size_t len = Int_val(v_len);
ssize_t ret;
caml_enter_blocking_section();
ret = tee(fd_in, fd_out, len, flags);
caml_leave_blocking_section();
if (ret == -1)
caml_uerror("tee", Nothing);
CAMLreturn(Val_long(ret));
}
#endif
#if defined(EXTUNIX_HAVE_VMSPLICE)
CAMLprim value caml_extunixba_vmsplice(value v_fd_out, value v_iov, value v_flags)
{
CAMLparam3(v_fd_out, v_iov, v_flags);
unsigned int flags = caml_convert_flag_list(v_flags, splice_flags_table);
int fd_out = Int_val(v_fd_out);
int size = Wosize_val(v_iov);
struct iovec* iov = alloca(sizeof(struct iovec) * size);
ssize_t ret;
int i;
value tmp;
struct caml_ba_array* ba;
int offset, length;
for (i = 0; i < size; i++)
{
tmp = Field(v_iov,i);
/* field 0 is a 'a carray8 (bigarray of 8-bit elements)
field 1 is the offset in the bigarray
field 2 is the length */
ba = Caml_ba_array_val(Field(tmp,0));
offset = Int_val(Field(tmp,1));
length = Int_val(Field(tmp,2));
if(offset + length > ba->dim[0])
caml_invalid_argument("vmsplice");
iov[i].iov_base = (char *) ba->data + offset;
iov[i].iov_len = length;
}
caml_enter_blocking_section();
ret = vmsplice(fd_out, iov, size, flags);
caml_leave_blocking_section();
if (ret == -1)
caml_uerror("vmsplice", Nothing);
CAMLreturn(Val_long(ret));
}
#endif
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